Hi, I notice that if you add a DRIVER_SELF_SPEC option and then add that option as a MULTILIB_OPTION, it doesn't build certain libraries for that multilib variant. for example, if you add: "%{mtestoption:-mcpu=cortex-a5 %<mtestoption}" (and then define mtestoption in the opt file) then add mtestoption as a multilib variant, it builds some of the libraries for that variant but not others. notable missing libraries being: libstdc++, libssp and libsupc++. most of the others are there. If you just add cortex-a5 as the variant then it works fine. Is this by design? Thanks, Carlos